Sounds like a callous. It's not uncommon in older dogs. My 9 year old is starting to get them. I'd recommend either getting her making her a good quality bed to sleep on, so she doesn't have as much pressure on those elbows. Also, keep putting a pad cream on the callous to keep it soft. Yeah, she'll lick it off pretty quick, but some of it will get in there for her. Only other thing I could recommend, is making sure you're feeding as high quality of a food as you can afford and she can tolerate.

Since Sassy came home 15 years ago she hasn't had them. She did when she arrived. It helps that she loves to lay on soft padded surfaces only. If she got hot and lay on the hard floor she might get them again. Max, don't know if I could tell if he had bald elbows or not under that fur. He prefers hard surfaces most of the time. Try a folded blanket or small rug in spots the dog likes to lay if you don't have a bed or even train the dog to go to a bed in a safe spot.

Iris has her own beds, plus uses ours, and the sofa. she also likes to sleep on cool tile sometimes. we found that gently squeezing the area to break up the callous, and applying non toxic cream helps eventually.